硝酸银的黑色污染物可以用氨水处理掉。

When I said someone broke the school regulations, I ______ you. Why did you get that angry?

A．don’t refer to

B．haven’t referred to

C．wasn’t referring to

D．hadn’t referred to

A promising note is a written agreement to pay a certain sum of money at some time future .

A．time futures

B．futures

C．futures time

D．future time

设有50行60列的二维数组A[50][60]，其元素长度为4字节，按行优先顺序存储，基地址为200，则元素A[18][25]的存储地址为( )。

A．3700

B．4376

C．3900

D．4620

“百年大计，教育为本”思想的提出是在党的( )。

A．十二大
B．十三大
C．十四大
D．十五大

钢的耐热性包括（）和（）两个指标。